I think theyre living the typical life. They drive their children to school, they sit at a desk all day long, they may play some video games and they go to sleep, said Archer. Thats an unfair slam on video games, which require more physical and mental activity than watching TV. Some took issue with the studys definition of vigorous exercise, which includes fat-burning activities such as jogging or jumping rope. One researcher suggested a simple walk could be considered vigorous exercise for the obese, which the CDC defines as those having a body mass index (BMI) of 30 or higher. For the original version including any supplementary images or video, visit http://blogs.ajc.com/news-to-me/2014/02/21/study-obese-women-exercise-one-hour-per-year/